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      1 // Copyright 2016 PDFium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
      6 
      7 #include "core/fpdfapi/render/cpdf_imageloader.h"
      8 
      9 #include "core/fpdfapi/page/cpdf_image.h"
     10 #include "core/fpdfapi/page/cpdf_imageobject.h"
     11 #include "core/fpdfapi/render/cpdf_dibsource.h"
     12 #include "core/fpdfapi/render/cpdf_imagecacheentry.h"
     13 #include "core/fpdfapi/render/cpdf_pagerendercache.h"
     14 #include "core/fpdfapi/render/cpdf_renderstatus.h"
     15 
     16 CPDF_ImageLoader::CPDF_ImageLoader()
     17     : m_MatteColor(0),
     18       m_bCached(false),
     19       m_pCache(nullptr),
     20       m_pImageObject(nullptr) {}
     21 
     22 CPDF_ImageLoader::~CPDF_ImageLoader() {}
     23 
     24 bool CPDF_ImageLoader::Start(const CPDF_ImageObject* pImage,
     25                              CPDF_PageRenderCache* pCache,
     26                              bool bStdCS,
     27                              uint32_t GroupFamily,
     28                              bool bLoadMask,
     29                              CPDF_RenderStatus* pRenderStatus) {
     30   m_pCache = pCache;
     31   m_pImageObject = const_cast<CPDF_ImageObject*>(pImage);
     32   bool ret;
     33   if (pCache) {
     34     ret = pCache->StartGetCachedBitmap(m_pImageObject->GetImage(), bStdCS,
     35                                        GroupFamily, bLoadMask, pRenderStatus);
     36   } else {
     37     ret = m_pImageObject->GetImage()->StartLoadDIBSource(
     38         pRenderStatus->GetFormResource(), pRenderStatus->GetPageResource(),
     39         bStdCS, GroupFamily, bLoadMask);
     40   }
     41   if (!ret)
     42     HandleFailure();
     43   return ret;
     44 }
     45 
     46 bool CPDF_ImageLoader::Continue(IFX_PauseIndicator* pPause,
     47                                 CPDF_RenderStatus* pRenderStatus) {
     48   bool ret = m_pCache ? m_pCache->Continue(pPause, pRenderStatus)
     49                       : m_pImageObject->GetImage()->Continue(pPause);
     50   if (!ret)
     51     HandleFailure();
     52   return ret;
     53 }
     54 
     55 void CPDF_ImageLoader::HandleFailure() {
     56   if (m_pCache) {
     57     CPDF_ImageCacheEntry* entry = m_pCache->GetCurImageCacheEntry();
     58     m_bCached = true;
     59     m_pBitmap = entry->DetachBitmap();
     60     m_pMask = entry->DetachMask();
     61     m_MatteColor = entry->m_MatteColor;
     62     return;
     63   }
     64   RetainPtr<CPDF_Image> pImage = m_pImageObject->GetImage();
     65   m_bCached = false;
     66   m_pBitmap = pImage->DetachBitmap();
     67   m_pMask = pImage->DetachMask();
     68   m_MatteColor = pImage->m_MatteColor;
     69 }
     70